Bathurst Basin is a small triangular basin on the south side of Bristol's Floating Harbour, situated between Redcliffe Bridge and Prince Street Bridge. It takes its name from Charles Bathurst, a Bristol MP in the early 19th century.

Originally it served as a connection to the Avon New Cut for small vessels, but that connection is now closed and the basin functions as a small marina.

As a canoe access point on the River Avon, the basin is documented in local paddling guides alongside other launch sites such as Gaol Ferry Slipway and Underfall Bank. Access involves ascending a ladder on the left side of the basin entrance.

A manually operated swing footbridge — swung by hydraulic pump action — crosses the northern entrance to the basin, replacing an earlier bascule bridge that once carried the Bristol Harbour Railway.